package cn.lhjl.day04.Usb接口案例;

public class Computer {
    public void open() {
        System.out.println("打开电脑");
    }

    public void close() {
        System.out.println("关闭电脑");
    }

    public void usbDevice(Usb usb) {
        usb.open();
        if (usb instanceof Mouse) {
            Mouse mouse = (Mouse) usb;
            mouse.click();
        }else if (usb instanceof Keyboard){
            Keyboard keyboard = (Keyboard) usb;
            keyboard.type();

        }
        usb.close();
    }
}
